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Issue 12, 2016
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Fabrication of hierarchical composite microspheres of copper-doped Fe3O4@P4VP@ZIF-8 and their application in aerobic oxidation

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Abstract

Novel hierarchical magnetic composite microspheres of copper-doped Fe3O4@poly(4-vinylpyridine-co-divinylbenzene)@ZIF-8 (Cu-FPZ, Cu stands for copper doped) were successfully fabricated. The core–shell Fe3O4(PAA)@P4VP magnetic microspheres were first synthesized by a polymerization approach, in which the 4-vinylpyridine (4-VP) monomer interacted with a –COOH group of poly(acrylic acid) modified Fe3O4 by means of a hydrogen-bond interaction. Then Zn2+ was adsorbed on the surface of the P4VP shell, followed by the formation of a ZIF-8 porous shell with 2-methylimidazolate. Finally, nearly 5.45 wt% of copper content was incorporated with the ZIF-8 framework to form a magnetic core–shell copper-doped Fe3O4@P4VP@ZIF-8. The obtained copper-doped Fe3O4@P4VP@ZIF-8 catalyst was applied in the selective oxidation of alcohols and epoxidation of olefins using molecular oxygen as the oxidant. The results demonstrated that the magnetic core–shell copper-doped Fe3O4@P4VP@ZIF-8 catalyst showed better catalytic activity with significantly improved turnover number and turnover frequency (up to 8.25 h−1) than other copper MOFs. Furthermore, this heterogeneous catalyst could be cycled at least 15 times without significant loss of activity.

Graphical abstract: Fabrication of hierarchical composite microspheres of copper-doped Fe3O4@P4VP@ZIF-8 and their application in aerobic oxidation

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Publication details

The article was received on 18 Jul 2016, accepted on 14 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6NJ02239A
Citation: New J. Chem., 2016,40, 10127-10135
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    Fabrication of hierarchical composite microspheres of copper-doped Fe3O4@P4VP@ZIF-8 and their application in aerobic oxidation

    J. Hou, Y. Luan, J. Yu, Y. Qi, G. Wang and Y. Lu, New J. Chem., 2016, 40, 10127
    DOI: 10.1039/C6NJ02239A

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